Improvement in air-pumps



No.45,220. PATENTED NOV. 29, 1864. N. H. BORGFELDT.

AIR PUMP.

77/Z i77/665 ca: .fn We 72 Ear:

emu biiiriiicii UNITED STATES PATENT Oeeieeg N. H. BURG FELDT, OF NEW? YORK, N Y.

iMPROi/EM EN'T EN Aim-PUMPS i pecificetion forming" part. of Letters Patent No. New, dated November 29, 1864.

To iii whom it cm sauce-re:

Be it known that 1, li H. BQRGFELDT, of ihe city, ccuniy, emi fciiete of New Ycriz, have invented a new :imi iiiipmveii Air-Pump; and i do hereby iieciiwe i'u'ii, ciem', and exact description therecigwhieh wiii enebie tiicec eiitiiieei in the art to make and use the same, reference being; had to the accompanying iiiiii'iiiii fencing pen; cf this epceiiicaticn, ii which Figure 1 Tepreeeiiie Yer' icziui eenirei iioi'i ci" iiiisiziiei'i'izicii, .Eie a EJUMZOBWLZ eeeticii mike-mime Similar ieiziem 0i? reieieiice indicate (/9118- epeiii'iing per ee This ccm'eciicii ccizeiei-c in iiici; revoi'viiig under water -iiii'i prcviiieii with. e, ziie supply 01 siiciimi 'pi' em m Wii-ii c ne we were iiiiiiaii iiiseixziiri eeeili by "Fe-ices iii iii er inc-ere Wings pieced ever the end 0i e12. iie the rziciiecic iiieciieige ciieiiiieis, anii made to cpei a, Time e15 ieie mated. i ii'ei-i'eie iiiii'iii ie revc'i iiicii cf iiie iiie'k. in such 'ii'iis'iifli Wliienevee ewe iii" the wings iii epeiiei'i Oi. we e eiii {E0351 periphery of (iWi ii vacuum ie i'cii'meii, (time waiter iiriiieg iici me tccecupy the space iei't eiiipicyiay ijilfi eiciicii iii? the wing and. exiei'cei aii? Tiieiiee wiive, cceupies the f. Neville eiceesi Line ziiif'i ,ii'cueii the end eciiecis (m tiieiecfi ieeie'eei' an eiirrcciiiceii mm 01' There mcvchie s, iv'iiiisii, when mcvi: "5e cue iii'ififitiml i or cggeice'tthe pi'ecsm'e citiie iiii' iieviciieiy cc piteeeeei eeticxi the pump, and iii "ciie eeiiie time. eTee Je vaccine: in be occupied by the ex ceriizii aii, eiiiiiwiiieii, when moving" iii the opposite (iiifiiiOIi; we partiiiiiy or wiaciiy impeiie by tile eciiec cf the air prei 'icziei ccilepieeeeijii, and the e; aims of the i'i'eiiii ziie which eeieTef-i ic 'i'zieziiim ie iiiciiiieieii A. represents 2i ri'ieii: mmie ci' meie'i, weed, er any other suitable iiiiiteriiai. ii; iieie its hearings on nccniciii point-i, a, and cm a tube, 7), said conic-iii point being eteppeai into a eiiitzibie socket on the bottom of the be B whereas time nice I) extends up through a etiiii ing-b0x,c, in time m7 of the images eieaiiy shown in Fig, 1 cf the iiiewingei The tube 1') communicates wi'iii a series of radiating chenneis, (i, which extend cut through the periphthat the fniiowing is ein the disk, and the valves 0f chose chaineeisi which extend from the center in opposite ii recticns are ccmiected by eizistic cords, e, se that ivy-these cards the valves are held in their seats with sui'fieienc power te prevent them i'rcm cpeningsponizmeousiy. Themoutii oi'ezich of the radiating channeie is covered iiy Wing, U, which is hinged izc the disk, as that itcpeus eeei cicses, es chem: in Figs. 1 2111612, where ceecf iiie wings ie epen and the etherii cieseci. These wings are cpereiseci by stcdef; which. pmjectfrom upper mid iewer eii end move in cemgmcvee g which are seemed. in the hex B eiicve eeiew iiie iiis i'. life reduce the frietic'n, the etmie fare. prcvieieii. with. friction-renew ei e cemgivccves are s0 a'ped that they keep the w ege ciceed tiieccg'hmit the entirereveficiicn iice disk, with iihe exception ci a very sheet cpece ci' izime Where each wing is e ieiieii and then. again eieseii.

The .tceiicii cf the dieiz iekcs niece in the (liciie air time cciighi under it fereeti eiii;

acreage iiic wetei, iii cciiecte en the em:-

i'aee of ihe meterie the eievicue that the mctiee 0f- $51 9 3 imzet'iie euiiieiezitiy quick "(0 prevent i-iie ei-er imm occupying the 6i13p Sp2iGB,WhiGiE iiaew even, is e very eaey matter, Wiie'e ii; is considereei iiiei; the disk need nci; be ccveeeii by came time three er i'eiie ineiees ei' Wfiiifiik ltf'itccvereci by iiireeinehee cf Water, the veieeiii-y with which the Water eeeiae "w occupy empuy epeee is equal Le if: b' gr 01* few. feet per seconci; and the iiisiiiz which is suppesed te in? we 2i diameter of ebieeet awe feet can eesiiy he rctateii with a velocity cf sixty 01 more revolutions per minute, giving each. Wiiig 1i veiceity of six or mere feei; per eeecnci. The air which acts cancer-e cciumn of air: of at least twentyfive t'iicueciid ieei: feiiis with c veiccity of about thirieeli heeeireai feet per second, so that it will occupy thecinpty space under all circumstances,'and for each motion of each wing a certain quantity of air is forced into the box.

It is obvious that by this operation a large quantity ot'air can be compressed in therbox but how far the compression can be carried on depends upon the velocity of the disk, be-

cause the pressure of the air acting on the surface of the water increases the velocity with which the water seeks to occupy the empty space. For instance, if the pressure of the air in the box is equal to sixteen pounds to the square inch, the velocity with which the water: seeks .to occupy the empty space will be forty-two feet per second, and a two-foot. disk would have to be rotated at the rate of 'i'our hundred revolutions per minute in order to produce the desired result.

The power requisite to revolve the disk and to open and close the wings is not increased by the compressed air, because the same power which opposes the opening of the wings assists in closing the same and in forcing the air occupying the space under the wing out through the water.

A large quantity of air can thus be compressed into the box with comparatively lit-.

tle power, and a forced current of air can thus be created, which can be used with great advantage in various mechanical or chemical operations; or the compressed air may be used "as a motive power, if desired.

I claim as new and desire to secure by Letters Patent 1. A centrifugal air-pump the working or pumping part of which acts under water or other liquid.

2. The disk A, revolving under water or other liquid and provided with a central supply-pipe, b, and one or more radialdischargechannels, 01 in combination with spring-valves e, and wings O, constructed and operating substantially as and for the purpose set forth.

3. The application of a cam-groove, g, in combination with the wing or wings 0 and revolving-disk A, constructed and operating sustantially as and for the purpose specified.

N. H. BO'RGFELDT.

Witnesses Wu. F. MCNAMARA, J. P. HALL. 

